Subject: I-D ACTION:draft-ietf-mpls-ldp-ft-05.txt

From: [email-masked]
Date: Tue, 17 Sep 2002 08:00:20 -0400

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching Working Group of the IETF.

	Title		: Fault Tolerance for the Label Distribution Protocol 
                          (LDP)
	Author(s)	: A. Farrel
	Filename	: draft-ietf-mpls-ldp-ft-05.txt
	Pages		: 52
	Date		: 2002-9-16
	
Multiprotocol Label Switching (MPLS) systems will be used
in core networks where system downtime must be kept to an
absolute minimum.  Many MPLS Label Switching Routers
(LSRs) may, therefore, exploit Fault Tolerant (FT)
hardware or software to provide high availability of the
core networks.
The details of how FT is achieved for the various
components of an FT LSR, including Label Distribution
Protocol (LDP), the switching hardware and TCP, are
implementation specific.  This document identifies issues
in the LDP specification in RFC 3036 'LDP Specification'
that make it difficult to implement an FT LSR using the
current LDP protocols, and proposes enhancements to the
LDP specification to ease such FT LSR implementations.
The issues and extensions described here are equally
applicable to RFC 3212, 'Constraint-Based LSP Setup Using
LDP' (CR-LDP).

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